Home / 15,399.86-21,251.84-8,326.31

Finding the Fourth Proportional to 15,399.86, 21,251.84 and 8,326.31

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Solution

The fourth proportional to 15,399.86, 21,251.84 and 8,326.31 is: 11,490.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.86 : 21,251.84 = 8,326.31 : x
  2. Step 2: Convert to fraction form
    15,399.86/21,251.84 = 8,326.31/x
  3. Step 3: Cross multiply
    15,399.86x = 21,251.84 × 8,326.31
  4. Step 4: Simplify right side
    15,399.86x = 176,949,260.02
  5. Step 5: Solve for x
    x = 176,949,260.02/15,399.86
  6. Step 6: Final answer
    x = 11,490.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.